## ››Convert attobar to inch of water [4 °C]

 attobar inch of water

How many attobar in 1 inch of water? The answer is 2.4908890833333E+15.
We assume you are converting between attobar and inch of water [4 °C].
You can view more details on each measurement unit:
attobar or inch of water
The SI derived unit for pressure is the pascal.
1 pascal is equal to 10000000000000 attobar, or 0.0040146307866177 inch of water.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between attobars and inches of water.
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## ››Definition: Attobar

The SI prefix "atto" represents a factor of 10-18, or in exponential notation, 1E-18.

So 1 attobar = 10-18 bars.

The definition of a bar is as follows:

The bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). The word bar is of Greek origin, báros meaning weight. Its official symbol is "bar"; the earlier "b" is now deprecated, but still often seen especially as "mb" rather than the proper "mbar" for millibars.

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